Interesting concept. I got as far as the room with the dead dragon but couldn't figure out what to do after that. The list of commands was immensely helpful and I found that a few others worked as well (e.g. pry).
The story at times was hard to visualize. One time the climb command has you moving downwards which I felt was confusing.
I made good use of the undo option so thanks for having that feature. Very useful!
I also liked how the game was available to play in-browser via the link on the game page. Much more convenient than figuring out what to do with the obscure gblorb file.